Question

the vertex of this parabola is at (-5 4). which of the following could be its equation
A. y = -(x - 5)^2 + 4
B. y = -(x + 5)^2 - 4
C. y = -(x + 5)^2 + 4
D. y = -(x - 5)^2 - 4

Answer 1

http://www.mathwarehouse.com/geometry/parabola/images/standard-vertex-forms-thumb.png <--- what do you think?

Answer 2

I think A.

Answer 3

well... let's try A then \(\bf y=a(x-{\color{brown}{ h}})^2{\color{green}{ +k}}\qquad y=-(x-{\color{brown}{ (-5)}})^2{\color{green}{ +4}}\) is it?

Answer 4

I basically went with the look of the equation, yes?